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1.1 root 1: /*
2: * Copyright (c) 1988 University of Utah.
3: * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
4: * All rights reserved.
5: *
6: * This code is derived from software contributed to Berkeley by
7: * the Systems Programming Group of the University of Utah Computer
8: * Science Department.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: *
38: * from: Utah $Hdr: machparam.h 1.11 89/08/14$
39: *
40: * @(#)param.h 7.8 (Berkeley) 6/28/91
41: */
42:
43: /*
44: * Machine dependent constants for amiga
45: */
46: #define MACHINE "amiga"
47: /* this is the common denominator, MID_AMIGA040 binaries should never be
48: the default */
49: #define MID_MACHINE MID_AMIGA030
50:
51: /*
52: * Round p (pointer or byte index) up to a correctly-aligned value
53: * for all data types (int, long, ...). The result is u_int and
54: * must be cast to any desired pointer type.
55: */
56: #define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1))
57:
58: #define NBPG 8192 /* bytes/page */
59: #define PGOFSET (NBPG-1) /* byte offset into page */
60: #define PGSHIFT 13 /* LOG2(NBPG) */
61: #define NPTEPG (NBPG/(sizeof (struct pte)))
62:
63: #define NBSEG (2048*NBPG) /* bytes/segment */
64: #define SEGOFSET (NBSEG-1) /* byte offset into segment */
65: #define SEGSHIFT 24 /* LOG2(NBSEG) */
66:
67: #define KERNBASE 0x0 /* start of kernel virtual */
68: #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
69:
70: #define DEV_BSIZE 512
71: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
72: #define BLKDEV_IOSIZE 2048
73: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
74:
75: #define CLSIZE 1
76: #define CLSIZELOG2 0
77:
78: /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
79: #define SSIZE 1 /* initial stack size/NBPG */
80: #define SINCR 1 /* increment of stack/NBPG */
81:
82: #define UPAGES 2 /* pages of u-area */
83:
84: /*
85: * Constants related to network buffer management.
86: * MCLBYTES must be no larger than CLBYTES (the software page size), and,
87: * on machines that exchange pages of input or output buffers with mbuf
88: * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
89: * of the hardware page size.
90: */
91: #define MSIZE 128 /* size of an mbuf */
92: #define MCLBYTES 1024
93: #define MCLSHIFT 10
94: #define MCLOFSET (MCLBYTES - 1)
95: #ifndef NMBCLUSTERS
96: #ifdef GATEWAY
97: #define NMBCLUSTERS 512 /* map size, max cluster allocation */
98: #else
99: #define NMBCLUSTERS 256 /* map size, max cluster allocation */
100: #endif
101: #endif
102:
103: /*
104: * Size of kernel malloc arena in CLBYTES-sized logical pages
105: */
106: #ifndef NKMEMCLUSTERS
107: #define NKMEMCLUSTERS (3072*1024/CLBYTES)
108: #endif
109:
110: /* pages ("clicks") to disk blocks */
111: #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
112: #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
113: #define dtob(x) ((x)<<DEV_BSHIFT)
114:
115: /* pages to bytes */
116: #define ctob(x) ((x)<<PGSHIFT)
117:
118: /* bytes to pages */
119: #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
120:
121: #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
122: ((unsigned)(bytes) >> DEV_BSHIFT)
123: #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
124: ((unsigned)(db) << DEV_BSHIFT)
125:
126: /*
127: * Map a ``block device block'' to a file system block.
128: * This should be device dependent, and should use the bsize
129: * field from the disk label.
130: * For now though just use DEV_BSIZE.
131: */
132: #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
133:
134: /*
135: * Mach derived conversion macros
136: */
137: #define amiga_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
138: #define amiga_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1))
139: #define amiga_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
140: #define amiga_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
141: #define amiga_btos(x) ((unsigned)(x) >> SEGSHIFT)
142: #define amiga_stob(x) ((unsigned)(x) << SEGSHIFT)
143: #define amiga_btop(x) ((unsigned)(x) >> PGSHIFT)
144: #define amiga_ptob(x) ((unsigned)(x) << PGSHIFT)
145:
146: /*
147: * spl functions; all but spl0 are done in-line
148: */
149: #include <machine/psl.h>
150:
151: #define _spl(s) \
152: ({ \
153: register int _spl_r; \
154: \
155: asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
156: "&=d" (_spl_r) : "di" (s)); \
157: _spl_r; \
158: })
159:
160: /* spl0 requires checking for software interrupts */
161: #define spl1() _spl(PSL_S|PSL_IPL1)
162: #define spl2() _spl(PSL_S|PSL_IPL2)
163: #define spl3() _spl(PSL_S|PSL_IPL3)
164: #define spl4() _spl(PSL_S|PSL_IPL4)
165: #define spl5() _spl(PSL_S|PSL_IPL5)
166: #define spl6() _spl(PSL_S|PSL_IPL6)
167: #define spl7() _spl(PSL_S|PSL_IPL7)
168:
169: #define splnone() spl0()
170: #define splsoftclock() spl1()
171: #define splnet() spl1()
172: #define splbio() spl3()
173: #define splimp() spl3()
174: #define spltty() spl5()
175: #define splclock() spl6()
176: #define splvm() spl6()
177: #define splhigh() spl7()
178: #define splsched() spl7()
179:
180: /* watch out for side effects */
181: #define splx(s) (s & PSL_IPL ? _spl(s) : spl0())
182:
183: #ifdef KERNEL
184: int cpuspeed;
185: extern int DELAY __P((int count));
186: #else
187: #define DELAY(n) { register int N = (n); while (--N > 0); }
188: #endif
189:
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